Answer:
3.0
Same explanation as the person above but the significant figures must be considered in physics.
Answer:
Therefore, when the radius of a sphere is increased by 25%, the surface area increases by approximately 56.25%.
Explanation:
The surface area of a sphere is given by the formula: Surface Area = 4πr^2 where r is the radius of the sphere.
To find the percentage increase in surface area when the radius is increased by 25%, we can follow these steps:
1. Let's assume the initial radius of the sphere is r.
2. If the radius is increased by 25%, the new radius will be 1.25r (since 25% is equivalent to multiplying by 1.25).
3. Now, we can calculate the initial surface area (A1) using the formula: A1 = 4πr^2. 4.
Similarly, we can calculate the new surface area (A2) using the formula: A2 = 4π(1.25r)^2 = 4π(1.5625r^2) = 6.25πr^2.
5. The percentage increase in surface area can be calculated as follows: Percentage Increase = ((A2 - A1) / A1) * 100
6. Plugging in the values we obtained earlier,
we have: Percentage Increase = ((6.25πr^2 - 4πr^2) / 4πr^2) * 100 = ((2.25πr^2) / 4πr^2) * 100 = 56.25%
Ordovician-Silurian
Permian-Triassic
End Triassic
Cretaceous-Tertiary
The Late Devonian.
If you go back and reach the text, you may find the passage, "Which species did we lose during this extinction (Late Devonian)? About 20% of all animal families and 70-80% of all animal species were lost. Major victims included the following:
....
- Jawless fish"
Answer:
A = 2 cm, λ = 8 cm
Explanation:
The amplitude of a wave is the maximum height it has, in this case the height is measured by the vertical ruler,
We are told the balance point is in the reading of 5 cm, that the maximum reading is 3 cm and the Minimum reading is 7 cm. Therefore, the distance from the ends of the ridge to the point of equilibrium is
d = 7-5 = 2 cm
d = 5-3 = 2 cm
A = 2 cm
The wavelength is the minimum horizontal distance for which the wave is repeated, that is measured by the horizontal ruler.
The initial reading for 4 cm and the final reading for 8 cm, this distance corresponds to a crest of the wave, the complete wave is formed by two crests whereby the wavelength is twice this value
Δx = 8-4 = 4 cm
λ = 2 Δx
λ = 8 cm
The force of gravitational attraction between you (of mass 50kg) and the Earth (of mass 5.97x10^24 kg) can be calculated using Newton's Universal Law of Gravitation. Substituting the respective values in the formula, the calculated force is approximately 490.5 N.
The force of gravitational attraction between you and the earth can be calculated using Newton's Universal Law of Gravitation. This law states that the force (F) between two masses (m1 and m2) separated by a distance (r) is given by the formula F = G*(m1*m2/r^2), where G is the gravitational constant and is approximately 6.67x10^-11 N*(m^2/kg^2).
In this case, your mass (m1) is 50 kg, Earth's mass (m2) is 5.97x10^24 kg and the radius of Earth (r) is 6.38x10^6 m. Substituting these values into the formula, we can find the force of gravitational attraction between you and the Earth.
F = (6.67x10^-11 N*(m^2/kg^2)) * ((50 kg) * (5.97x10^24 kg)) / (6.38x10^6 m)^2. After calculating the above equation, you find that F ≈ 490.5 N.
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